Combined type-writer and computer.



H. MARSHALL. GOMBINED0 TYPE WRITER AND COMPUTER.

APPLICATION FILED SEPT. 25, 1907.

Patented Jan 24,` 1911.

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IG Z [JVM/INTO@ MW MMM@ fr 7&57 gan/f MW v4HOLMES MARSHALL, 0F YORK, N.Y.

To alll uihomft may Be itrknown that L'Honmns MARSHALL,

i a citizen of ithe United States, residing at complish this by NewYork, in the county of New York Aand State of New York, have invented acertain new and useful Improvement in a Combined Type-Writer IandComputer of which the following is a full, clear, an exactdescription,reference being had tothe accompanying drawings.

n combining a computing device withl a book-typewriter, it has beencustomary to mount the computing device on a horiz'ontal bar at the rearof the traveling typewriter carriage vand provide on thaty carriage amaster wheel vwhich travels from order to order of the computer as thetypewriter escapes for each character printed. `Such is the arrangementshown, for example, in Patent No. -820,879issued May 15th,.1906 to C. F.Laganke and J. A. Smith. In such embodiment, the figures on lthecomputer wheels have necessarily been of small size,` for no greaterwidth is allowedto the wheel than the width of one space on thetypewriter. This makes the figures so small that, even thou h they areobserved through a magnifying lens, the observation ,is frequentlyincorrect.

`One of the objects of this invention is to provide mechanlsm wherebythere mayv be combined with the traveling carriage acomputingdevicewhose wheels are wlder than the escapement space of the carriage.I acmechanism which gives the computin device a movement from right toleft as te carriage escapes from left to right, so that the wheels onvthe computer have a width equal to the sum of these movements andvthereby are much wider, and thelr indications 'more easily visible,than heretofore. v

Another object of the invention is to provide means enabling errors inthe registration to be easily and` quickl corrected.

vrThe invention is hereina ter more fully explained and its essentialcharacteristics set out inthe claims.

f The drawings show my invention as embodied with a typewriter oftheElliot-Fisher style, such as shown inPatent No. 820,879 referred to. y y

Figure 1 is avertical section throu h the keyboard-carriage' and itssupporting rame; Fig. 2 is avsectional elevation on the line 2-2 of ig..f1 looking toward the leftgFig. 3 is -Bpeciacation of Letters Patent.appunti ma september as, '1907. nsmal no. 394,421.

comentan TYPE-WEITERTAND COMPUTER.

Patented aan. 24, 1911.

a vertical section looking in the same directhe escapement mechanism;Fig. 4

tial-side elevation of the accumulator, showing the Vdials disconnected.

As shown in the drawing, rack which is a portion of thev open base whichholds the aper to be printed; 1l is vthe Vintermediate Frame which 1sarranged to travel down the page over the rack 10; 12 is the typewritercarriage which is mounted to travel laterally on the frame 11. Thiscarriage has/fin er keys arran ed in several banks as 13 and 14,connectef by levers 15 andvlinks 16 with the type bars 17. The type 18carried by these type bars strike on top of the ribbon 19 and thuseffect the printing.

The periodical escapement of the carriage from left to right a dlstanceequal to a space for a letter or ligure is eilected by the followingmeans: At the rear of the traveling carriage and mounted on the frame 11is a rack 20. Meshing with this 21 on the shaft 22. This shaft ismounted inthe traveling carriage and has rigidly mounted on it anescapement wheel 23. Cooperating with this escapement are pallet levers24 and 25 connected the rock shaft 27. A suitable rock arm on this shaftis connected with lever arms 29, which have cross bars 30 standingbeneath pins 31 projecting rearward from the various key stems. Thisconstruction is more fully shown in t-he patent mentioned, to whichreference is made for fuller description. The operation is, thatwhenever a key is depressed, its pin 31, through the mechanismdescribed, rocks the pallet levers so that when the key stem returns, anescapement of one tooth is allowed the escapement wheelk23. Thismovement allows the tension spring to draw the carriage one space to theright.

Mounted on the traveling carriage is a master wheel 40, which is shownas provided with the pinion 41 meshing with the segment 42 which ispivoted at 43 and has teeth 44 meshing with'thertee'th on the segmentalend 45 of a rock arm 46. This rock arm is rigid on the shaft 47 fromwhich project arms 48 Which engage beneath other arms 49. Each of thearms 491s bent laterally at its front end and adapted to stand beneaththe pins 31 of the corresponding numeral, key 14. The normallyidledisrack is a pinion y 10 represents a tance between this pin and thearmv 49 varies according to the value of the numeral key, so that thefull depression of such key rotates the master wheel an amountcorresponding to the digit of the numeral key.

The master wheel, moving from left to right with the carriage, and beingrotated in proportion to the numeral keys, is presented successively tothe different orders of the accumulator or computing device and rotatesthese orders the amount of each digit added. The computing wheels ordials, which show the amounts and with which' the master wheelcoperates, are designated 60. They are mounted side by side in a frameor casing 7 5 which is carried by the casing 61 mounted on theintermediate frame 11 at the rear of the typewriter. In this casing 61is the carrying mechanism, conventionally shown at 7 4, and other partsof the computing device. The wheels 60 carry numerals on theirperipheries which are adapted to be observed throughthe windowv 62. Theaccumulator mechanism may be of any preferred construction, as, forexample, that shown in the atent referred to. It is provided withsuitable means for carrying and for setting back to zero, the latterbeing indicated by the segment lever 63.

To enable the computing wheels to be Wider than the escapement space ofthe typewriter carriage, I mount the whole computer movably, and Iprovide mechanism for moving it to the left as the carriage moves to theright. Thus, in the embodiment shown, the computer case 61 is slidablymounted on the guide 64, the computer case having a dovetailed tongue 65extending into a corresponding The guide is clamped to the horizontalbar 55 of the intermediate frame by means of a set screw 67. Secured tothe computer case is the rack 68. This rack meshes with vthe gear 69which is rigid with the pinion 70,

groove in the guide.

both being loosely mounted on the stud 71' projecting from the rear ofthe typewriter carriage. The pinion 70 meshes with the pinion 21 whichis on the escapement shaft. It results from the abovev describedconstruction, that when the carriage moves from left to right one s ace,the pinion- 21 turns in the right han direction and the pinion 7 O inthe left hand direction a corresponding amount; `the gear 69, however,which moves with the pinion 7 0, is of greater radius, so that while theshaft 71 moves with the' carriage one space to the right, the uppermostteeth of the gear move considerably more than one space, to the left. Inthe embodiment shown, the ear 69 is a little more than twice the size othe pinion' 7 0, so that for each space which the carriage (and hencethe shaft 71) moves to the ri ht, the uppermost teeth of the gear (anhence the rack 68 andthe computer) move to the left somewhat more of thepage of paper may be used for than two spaces. This enables the computerwheels-to have a width over twice the size of the carriage escapementspace, while for each escapement, the master wheel changes fromengagement with one computing device to a similar en agement with the.next. Suitable adjustab e set screws 72 and 79 are provided to limit themovement of the com uting device in opposite directions.

ith my invention, the left hand porticlin orf inary writing of theletter keys; -then, as the tabulation portion of the page is reached,4the gear 69 comes into mesh with the rack 68, the com uting devicebeing then at its extreme rig t hand position, as defined by the stop`79. When the gear 69 has meslied with the rack 68, for each space ofescapement of the typewriter carriage, the computer is shifted to theleft a considerably greater distance. The result is that the escapementfollowing the periphery of the units column brings the computing deviceinto its extreme left hand position against the stop 72, while the gear69 moves out. of

YVengagement with the rack 68, allowing subsequent independent operationof the typewriter. e

After operation, the computer remains in its extreme left hand posit-ionuntil the carrivage is drawn back to the left, when the gear 69rengaging moves the computer to the right, leaving it in its right handposition, as the gear clears the rack 68.

It will be noticed that the amount 'ot' movement ivenl to the computingdevice as the carriage makes each step, may be varied from that shown,to meet' the requirements of the particular machine. By this invention,one of the great objections'to mounting the computing device ontlie'intermediate frame is done away n with;l namely, the smallness( ofthe indicating characters, for the characters may, without difficulty`be made as large as desired.

One objection to the combined computing devices and book `typewritersnow in the market is that it is very ditiicult to correct errors oncemade, and it has been found impracticable in this class of mechanism, toprevent errors being made. The operator strikes a wrong key or strikesthe right key and gives it a blow of unequal force which often preventsthe proper operation of the safety devices intended to reduce errors.Errors thus invariably get into the accumulator, and the customary wayhas been to simply keep track of the errors and correct the final resultaccordingly, on account of the difficulty of correcting errors oncestruck into the accumulator. This method is alwaysiincertain andundesirable.

In'my invention I have/devised a very simple arrangement by whichcorrections can be'made. I mount the dial wheels,.with

l erroihas been made,

out o which the master wheel coperates, in a cas, ing of` their own,designated 75, lwhich stands directly in front` of the main casing 61 ofthe accumulator and is pivoted tothe lower portion thereof at 78. Innormal usage, the casing is held as if it were a art of the casing 61,by means of the latch liook T7 which engages a notch in the casing 75.In this position of the parts the dial' Wheelsengage on their rear andunder sides with the carrying mhan'ism and other mechanism of theaccumulator. Vhen an however, the typewriter cari'ia e is simply shiftedto take the same range of the accumulator, and the thumblatch isdisengaged from the casing 75, which is thereupon swung forward by thespring 76 as shown in Fig. 4. This releases the dials from any operativeengagement with the rest of the computing device and the dials may beturned as desired by a pencil or stylus oint.

AThe release o the dials from the rest of the computing mechanismenables the oper ator, in case of striking the wrong key, to set thatparticular dial backward or forward to the position it would have hadhad the right key been Struck. vIn case the gure struck caused thecomputing device to carry and the figure which should have been struckwould not have caused it to carry, or viceversa, he willsliift theadjacent wheel one tooth in the corresponding direction. When thecorrection has been made, the casing 75 is pressed rearwardly. and thespring catch 77 engages it and holds itin normal position.

Having thus described my invention, I claim:

1. The combination, with a series of digit carriers. of .a commonoperating device adapted to operate successively on the car` riers oflsuccessive orders, and mechanism for moving the' operating device fromorder to order and for automatically moving the digit carriers in theopposite direction.

2. The combination, with a series of computing wheels, of a master wheeladapted to be successively presented to the several wheels, means formoving the said master wheel in the direction from onel ordervto vthenext and for automatically moving the series of computing wheels in theopposite direction.

3. The combination of'a computing device having a series of wheels sideby side, a master actuator with which such wheels may cooperate, andmeans for moving the master actuator in one direction and the computingdevice as a whole periodically in the opposite direction in definedsteps.

4.' yThe combination of a computing device having a series of digitwheels, a master wheel, means for giving the master wheel varyingfractions of a revolution, and means for moving the master wheel in thedirection t from an order .to the next and for concurrently inovingthecomputing device in the opposite directloii.

writer carriage, a mastefr wheel carried computer with' which the masterwheel may coperate, mechanism for moving the coniputer to the left asthe typewriter carriage moves to the right while the master wheel is inrange of the computing device.A y

ecombination of a computing device, a typewriter carriage, a masterwheel, an escapenicnt device for the typewriter carriage, and mechanismwhereby said escapement moves the master tion andthe computing sitedirection.

7. The combination of a computing device having a series of wheels sideby side, a master wheel, an escapement device for the master wheel, andmechanism whereby said escapement moves the master wheel in onedirection and the computing device in the opposite direction, thedistance from each computing Wheel to in the next computing wheel beingequal to the sum of the movementsof the master wheel and computer forone escapement.

8. The combination of a typewriter hav ing an intermediate frame, and alaterally traveling carriage, an actuator mounted on the carriage, acomputing device carried by the intermediate frame, and mechanism formoving the computing device toward the left as the actuator moves towardthe right.

9. The combination of a typewriter having an intermediate frame and alaterally traveling carriage on which are mounted letter and numeralkeys, an escapeinent device for the typewriter carriage, a. master wheelmounted on the carriage, operative -connections between the numeral keysand master wheel, a computing device carried by the intermediate frame,and mechanism for moving the computing device toward the left as themaster wheel moves toward the right, said mechanism being controlled bythe escapement of the typewriter carriage.

10. The combination of a typewriter having an intermediate frame and alaterally `traveling carriage, an actuator mounted on the carriage,means for moving the carriage, a computing device carried by theintermediate franie, and mechanisinfor moving the computing devicetoward the left as the actuator moves toward the right, said mechanismcomprising racks on the computing device and on the intermediate frameand gearing journaled on the typewriter carriage and connected with saidracks.

11. In a computing typewriter, the combination of a frame and keyboardcarriage mounted to laterally move thereon, a rack carried by saidframe, a pinion carried by 5. The combination of a traveling type-vthereby, means vfor-moving the carriage a4 wheel in one direc-v device1n the oppothe corresponding pointv carriage mounted to travel thereon,a horizontal bar carried by the frame adjacent to the carriage, aguideway adjustably mounted on said bar, a computing device slidablymounted on said guideway, a traveling carriage mounted on said frame, anactuator mounted on the carriage andadapted to cooperate with thecomputing wheels, a rack depending from the front edge of the coniputingdevice, a stationary rack carried by the intermediate frame,'and gearingcarried by the typewriter carriage and connected with the two racksmentioned.

13. The combination of an actuator, mechanism to cause it to travel stepby step, a series of computing Wheels, each having a greater width thanone of the steps of the actuator, and means for moving said com- Aputingwheels in the opposite direction to the travel of the actuator.

14. The combination of a typewriter, an actuator havin a travelcorresponding to the travel of t e typewriter, a. computing device withwhich the actuator coperates, and which has wheels of a greater widththan such typewriter travel, and means for moving the computing devicein the opposite direction to the' travel of the actuator.

15. The combination of a ty ewriter having letter keys and numeral eys,a computing device, an actuator therefor, mechanism controlled by thenumeral keys for giving varying movements to the actuator, and anescapement-controlled mechanism connected with both the computer andactuator and serving to give them concurrent movements iii oppositedirections.

16. The combination of an accumulator having dials, a movable casingcarrying said dials, and adapted to shift them out of engagement withthe rest of the accumulator,v

and means for operating the dials.'

17. The combination of a frame, dials carried thereby, carryingmechanism, and means for holding the frame with the dials in engagementwith the carrying mechanism, said means being movable to a position tofree the dials from engagement with the -carrying mechanism.

18. The combination of a casing, dials carried thereby, carryingmechanism indean escapement device on thel pendent of the casing, meansfor holdin the casing with the dials in en gement wit the carryingmechanism, sai means being movable to a p osition to free the dials fromengagement with the carrying mechanism,

and means for operating the dials.

19. The combination with a computing` device having a series of digitwheels, a master wheel for operating the digit wheels, carryin carryingmechanism whereby corrections can be made. y

20. The combination of a book t ewriter, a computing device carried bythe intermediate frame thereof and having a series of digit wheels, amaster wheel carried by the typewriter carriage wheels, carryinmechanism, and means or moving the digit wheels out of enga ment withthe 4carrying mechanism, where y corrections can be made. n

21. The combination of a book typewriter, a master wheel carriedthereby, a computing device adjustably carried by the book typewriter,said computing device comprising a'casing, car `ng mec anism therein,digit wheels carrie independently of said casing and adapted to coperatewith the master wheel and the carrying mechanism or be out of engagementwith both.

22. The combination of a book typewriter, a master wheel carriedthereby, a computing device adjustably carried by the book typewriter,said computing device comprising a casing, carrying mechanism therein, asecond casing pivoted to the casing rst mentioned and digit wheelscarried by said pivoted casing and adapted to coperate with the masterwheel and the carrying mechanism.

23. The combination of a book typewriter, a master wheel carried therebya computing device adjustably carried by t e book typewriter, saidcomputing device comprising a casing, carrying mechanism therein, asecond casing pivoted to the casin irstmentioned, and digit wheelscarried y said pivoted casing and adapted to coperate with the masterwheel and the carrying ,mechanism, a sprin tending to separate thepivoted casing rom the main casing, and a. latch to hold such part-stogether against the action of the spring.

In testimony whereo I hereunto aix my signature in the presence of twowitnesses. HOLMES MARSHALL.

Witnesses:

Pmn P. BECK, Louis J. CA'ruN.

for operating the d1 't mechanism and means for moving the digit wheelsout of engagement with the 7o

